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Finding the Fourth Proportional to 66,174.72, 91,332 and 48,328.80

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Solution

The fourth proportional to 66,174.72, 91,332 and 48,328.80 is: 66,701.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,174.72 : 91,332 = 48,328.80 : x
  2. Step 2: Convert to fraction form
    66,174.72/91,332 = 48,328.80/x
  3. Step 3: Cross multiply
    66,174.72x = 91,332 × 48,328.80
  4. Step 4: Simplify right side
    66,174.72x = 4,413,965,961.60
  5. Step 5: Solve for x
    x = 4,413,965,961.60/66,174.72
  6. Step 6: Final answer
    x = 66,701.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.